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Frank Barchard 5dc477899b Harden I21xToI420 against oversize heights 
I21xToI420 (reached via I210ToI420 / I212ToI420): fix integer overflows
in ScalePlaneVertical_16To8() by switching to HalfRow_16To8.

Add a unit test covering the I21x vertical-scale path. Co-authored-by:
Timothy Nikkel <tnikkel@mozilla.com> Test: libyuv_unittest
--gtest_filter=*.I21xToI420NoHeightOverflow

AMD Zen4
 Was LibYUVConvertTest.I210ToI420_Opt (81 ms)
  30.32% Convert16To8Row_AVX2
  29.81% Convert16To8Row_AVX512BW
  25.72% InterpolateRow_16To8_AVX2

 Now LibYUVConvertTest.I210ToI420_Opt (56 ms)
  41.32% Convert16To8Row_AVX512BW
  40.13% HalfRow_16To8_AVX512BW

Vivo X300 (ARM Lunix C1 Ultra)
 Was LibYUVConvertTest.I210ToI420_Opt (89 ms)
  38.95% InterpolateRow_16To8_NEON
  37.25% Convert16To8Row_NEON

 Now LibYUVConvertTest.I210ToI420_Opt (85 ms)
  47.26% Convert16To8Row_SVE2
  30.39% HalfRow_16To8_SVE2

Bug: chromium:531172025
Change-Id: I23e1215030c40b8577d58617098a8aeec27dd99a
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8221883
Reviewed-by: Wan-Teh Chang <wtc@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
2026-08-08 12:11:18 -07:00
..
libyuv Harden I21xToI420 against oversize heights 2026-08-08 12:11:18 -07:00
libyuv.h NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00